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Origin and Evolution of life Quiz-11

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1. Which theory arguments that life on earth came from outer space?
  •  Theory of panspermia
  •  Cosmozoic theory
  •  Spore theory
  •  All of these
Solution
Theory of panspermia (cosmozoic) was proposed by, Richter (1865). According to this theory, ‘protoplasm’ reached the earth in the form of spores of germs or other simple particles from some unknown parts of the universe with the cosmic dust, and subsequently evolved into various forms of life

Q2. Given below some major events in the early history of life I. First heterotrophic prokaryotes II. First eukaryotes III. First autotrophic prokaryotes IV. First animals Choose the correct sequence of these evolutionary events
  •  IV, III, II, I
  •  I, III, II, IV
  •  I, II, III, IV
  •  IV, I, II, III
Solution
Sequence of main steps during evolution (i) Free atoms (ii) Formation of simple organic molecules (iii) Formation of complex organic molecules (iv) Formation of eobionts (v) Formation of prokaryotes (various mode of nutrition) (vi) Formation of autotropic prokaryotes (vii) Formation of eukaryotes (viii) Formation of animals

Q3. Hugo de Vries’s experimental organism was
  •  Fruitfly
  •  China rose plant
  •  Four O’clock plant
  •  Evening primrose
Solution
Experiment Conducted by Hugo de Vries He conducted his experiment on oenothera lamarckiana (everning primorse) and found several different types of plants when plant was self pollinated and its seeds were allowed to grow, majority of F_1 plants were similar to the parents but few were different. Hugo de Vries suggested from his experiments that new types of inherited characters may appear suddenly without any previous indication of their presence in the race

Q4. Giant dinosaurs and reptiles predominated during the Jurassic period. This period was also marked the evolution of higher insects and angiosperms, conifers, cycads, etc. Jurassic period belongs to …….. era Complete the given statement by choosing an appropriate option
  •  Cenozoic
  •  Palaeozoic
  •  Mesozoic
  •  Proterozoic
Solution
Mesozoic

Q5.Which phenomena confined the pouched mammals of Australia survived because of lack of competition from any other mammals?
  •  Continental origination
  •  Continental shifting
  •  Continental drifting
  •  Continental evolution
Solution
  Continental drift pouched mammals of Australian survived because of lack of competition from other mammals or animals

Q6. Age of gymnosperm is
  •  Cenozoic era
  •  Mesozoic era
  • Palaeozoic era
  •  Proterozoic era
Solution
Mesozoic era

Q7.I. Use and disuse of organs II. Inheritance of acquired characters III. Branching descent IV. Natural selection V. Mutation VI. Reproductive isolation The two key concepts of Darwinism from the given options are
  •  I and II
  •  III and IV
  •  V and VI
  •  IV and VI
Solution
Branching desent and natural selection are the two main concepts of Darwin. Mendel’s laws of inheritance and Weismann’s theory of continuity of germplasm (1892) discarded Lamarck’s concept of inheritance of acquired characters 

 


Q8.Darwin judged the fitness of an individual by
  •  Ability to defend itself
  •  TStrategy to obtain food
  •  Number of offsprings
  •  Dominance over other individuals
Solution
Darwin began to realise that under the intense competition of members in a population, any variation which favoured survival in a particualr environment would increase that individual’s ability to reproduce and leave fertile offspring. Less favourable variations would be at a disadvantage and organisms possessing them would therefore, have their chances of successful reproduction decreased. The survival of the fittest is a result of selection and proliferation of only those organisms which were most suitably adapted to the environment.

Q9.All the existing life forms share …A… and share …B… ancestors. The geological history of earth closely correlates with …C… history of earth. Choose the right option for A, B and C to complete the given statement with reference to NCERT text book
  •  A-dissimilarities, B-dissimilar, C-zoological
  •  A-dissimilarities, B-dissimilar, C-botanical
  •  A-dissimilarities, B-dissimilar, C-biological
  •  A-similarities, B-common, C-biological
Solution
A-Similarities, B-Common, C-Biological

Q10. Formation of more complex and specialized organisms from the simple and less elaborated forms is called
  •  Retrogressive evolution
  •  Progressive evolution
  •  Microevolution
  • Macroevolution
Solution
Evolution is commonly defined as any process of growth or development from one stage to another. Progressive means favouring or advocating progress, change, improvement and movement towards better conditions. Biological evolution refers more specifically to the changes in the gene pool of a population from generation to generation by the processes such as mutation, natural selection, and genetic drift

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